1. The problem statement, all variables and given/known data A 2.5 kg mass is attached to a 3.5 kg mass by a light string that passes over a friction-less pulley. The masses are released. a) What is the magnitude of the acceleration of the masses? b) What is the tension in the string? 2. Relevant equations (I think) Ft - mg = ma 3. The attempt at a solution I drew 2 free body diagrams for both the weights and they both have Fg and Ft on the y. On this 6th line, starting with (2.5)(a)... I made it so that Ft2 = Ft2 My answer was suppose to be 6.54 m/s in the work I showed because the acceleration of the bigger weight will accelerate negatively. So ignore the minus sign for my answer to a = I think I've done the best I could, but my answer is still wrong, not sure why.